The complete separation of the rooms is the essential point in the construction of a match factory. It is not only an indispensable condition, in order to give to the shops the dispositions necessary for the health of the men, but it is also an important precaution against fire and explosions.

It is necessary, not only to establish a separate shop for each operation, but also to adopt certain rules in the position of each shop, its construction, etc. etc. This will be better understood by the following diagram, which indicates all the dispositions to be taken to decrease the dangers and inconveniences of this fabrication.

1st. The grinding of the substances, and the preparation of the mastic must be done in a little apartment F, composed of a single room on the first floor, and isolated all round.

Fig. 10.

2d. The sulphuration and the dipping into the mastic are done together in a room G. equally isolated, longer than the above. The roof will be half open all the time for the escape of the vapors, and that the air may be continually renewed.

3d. The oven occupies a building D, also isolated. All the materials of this room are of iron, and it must always have passing through it a current of dry air.

4th. Laying and taking down of the Presses; Boxing. - The most important rooms are those of the laying of the presses, taking down, and the boxing. These three operations occupy many hands. The first operation not exposing the operatives to the phosphorous emanations, it is only necessary to keep them separate. The two other being very noxious, the shop must be in the most advantageous condition. A building alone, E, is disposed in the following manner: -

This building has two stories, and is isolated. In the first floor the presses are laid. The upper part has no communication with the room below, but presents a single room, and the roof is pierced with several windows, which are opened at will to let the noxious vapors escape.

The store rooms, habitation buildings arc isolated, as represented in II. The form and dimensions of this building may be arranged according to the taste of the manufacturer.

By following the above dispositions, great advantage will be realized; and, if to them we add the construction of a wall B, about 6 feet high, surrounding all the buildings, we see that match factories will be relieved of the inconveniences of being near to a public thoroughfare.

We are certain that this plan will present but little difficulty in its realization, and wo hope that hygienists will be satisfied with its disposition.

The fabrication of matches, though com-menced several years since, is still in its infancy.

Unhappily the savants have attached but little importance to this kind of manufacture, and it is only since the learned report of Mr. Chevreul that scientific bodies have given their attention to it. Let us hope that, before long, a match will be discovered, having all the properties of ordinary matches without their inconveniences.